The surface area of cube with edge length a is equal to___ ; volume equal to___ The radius of its circumscribed ball is___ The volume of its circumscribed sphere is___

The surface area of cube with edge length a is equal to___ ; volume equal to___ The radius of its circumscribed ball is___ The volume of its circumscribed sphere is___

Because it's a cube, not a square, it needs some space imagination. Its diameter is the body diagonal, not the face diagonal, √ 3a is the diameter, and the radius of the circumscribed ball is (√ 3 / 2) a, s = (√ 3 / 2) π a ^ 3